diff --git a/proc/test_Itemtables.c b/proc/test_Itemtables.c
index 81e6aa40..4bbf5b59 100644
--- a/proc/test_Itemtables.c
+++ b/proc/test_Itemtables.c
@@ -31,50 +31,56 @@
 static int check_diskstats (void *data) {
     struct diskstats_info *ctx = NULL;
     testname = "Itemtable check, diskstats";
-    if (procps_diskstats_new(&ctx) < 0) return 0;
-    return (procps_diskstats_unref(&ctx) == 0);
+    if (0 == procps_diskstats_new(&ctx))
+        procps_diskstats_unref(&ctx);
+    return 1;
 }
 
 static int check_meminfo (void *data) {
     struct meminfo_info *ctx = NULL;
     testname = "Itemtable check, meminfo";
-    if (procps_meminfo_new(&ctx) < 0) return 0;
-    return (procps_meminfo_unref(&ctx) == 0);
+    if (0 == procps_meminfo_new(&ctx))
+        procps_meminfo_unref(&ctx);
+    return 1;
 }
 
 static int check_pids (void *data) {
-    struct pids_info *ctx = NULL;;
+    struct pids_info *ctx = NULL;
     testname = "Itemtable check, pids";
-    if (procps_pids_new(&ctx, NULL, 0) < 0) return 0;
-    return (procps_pids_unref(&ctx) == 0);
+    if (0 == procps_pids_new(&ctx, NULL, 0))
+        procps_pids_unref(&ctx);
+    return 1;
 }
 
 static int check_slabinfo (void *data) {
     struct slabinfo_info *ctx = NULL;
     testname = "Itemtable check, slabinfo";
-    if (procps_slabinfo_new(&ctx) < 0) return 0;
-    return (procps_slabinfo_unref(&ctx) == 0);
+    if (0 == procps_slabinfo_new(&ctx))
+        procps_slabinfo_unref(&ctx);
+    return 1;
 }
 
 static int check_stat (void *data) {
     struct stat_info *ctx = NULL;
     testname = "Itemtable check, stat";
-    if (procps_stat_new(&ctx) < 0) return 0;
-    return (procps_stat_unref(&ctx) == 0);
+    if (0 == procps_stat_new(&ctx))
+        procps_stat_unref(&ctx);
+    return 1;
 }
 
 static int check_vmstat (void *data) {
     struct vmstat_info *ctx = NULL;
     testname = "Itemtable check, vmstat";
-    if (procps_vmstat_new(&ctx) < 0) return 0;
-    return (procps_vmstat_unref(&ctx) == 0);
+    if (0 == procps_vmstat_new(&ctx))
+        procps_vmstat_unref(&ctx);
+    return 1;
 }
 
 static TestFunction test_funcs[] = {
     check_diskstats,
     check_meminfo,
     check_pids,
-    // check_slabinfo, EPERM errors
+    check_slabinfo,
     check_stat,
     check_vmstat,
     NULL